Pass external function to a class method

Question

I would like to understand how to pass an external function to a class method. For example say I am trying to call a function 'job' every second.

import schedule
import time

def set_timer_minutes(func):
    schedule.every(1/60).minutes.do(func)

def job():
    print("I'm working...")

set_timer_minutes(job)
while 1:
    schedule.run_pending()
    time.sleep(1)

The above code prints 'I'm working' every second. But if I try to put it in a class

class Scheduler:
    def set_timer_minutes(self,func):
        schedule.every(1/60).minutes.do(func)
        while 1:
            schedule.run_pending()
            time.sleep(1)

def job():
    print("I'm working...")

x= Scheduler
x.set_timer_minutes(job)

I get

TypeError: set_timer_minutes() missing 1 required positional argument: 'func'

Where is the class method? What you have is an instance method. You may just be unaware of the python specific terminology relating to static, class and instance methods. One related link is this. — Paul Rooney
– Paul Rooney, Commented Jan 23, 2018 at 5:20

Bill Lynch · Accepted Answer · 2018-01-23 05:15:39Z

3

You need to create an instance of Scheduler.

x = Scheduler()

instead of

x = Scheduler

answered Jan 23, 2018 at 5:15

Bill Lynch

82.4k16 gold badges132 silver badges181 bronze badges

Sign up to request clarification or add additional context in comments.

2 Comments

AdR Over a year ago

Thank you brother Bill ! x = Scheduler() will create an instance. If you don't mind can you tell me what x = Scheduler does?

Bill Lynch Over a year ago

x = Scheduler creates another name to the class Scheduler. So you could do: AnotherSchedulerClass = Scheduler; x = AnotherSchedulerClass();.

Collectives™ on Stack Overflow

Pass external function to a class method

1 Answer 1

2 Comments

Your Answer

Linked

Hot Network Questions

Collectives™ on Stack Overflow

1 Answer 1

2 Comments

Your Answer

Sign up or log in

Post as a guest

Linked

Related